List of Articles sources of knowledge

• Open Access Article
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  1 - Study and analysis of the nature, principles, extent, types and sources of epistemology
  Mohammad farajzadeh Mohammad Reza  Sarmadi
• Open Access Article
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  2 - Historical Trends of Epistemological Issues in Pre-Sadrian Philosophical Tradition
  Ali Asghar  Jafari Valani Donya  Asadi Fakhrnejad